CVE-2026-35044

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.38, the Dockerfile generation function generate_containerfile() in src/bentoml/_internal/container/generate.py uses an unsandboxed jinja2.Environment with the jinja2.ext.do extension to render user-provided dockerfile_template files. When a victim imports a malicious bento archive and runs bentoml containerize, attacker-controlled Jinja2 template code executes arbitrary Python directly on the host machine, bypassing all container isolation. This vulnerability is fixed in 1.4.38.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/bentoml/BentoML/security/advisories/GHSA-v959-cwq9-7hr6	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:*

History

10 Apr 2026, 18:31

Type	Values Removed	Values Added
CPE		cpe:2.3:a:bentoml:bentoml::::::::
First Time		Bentoml Bentoml bentoml
References	~~() https://github.com/bentoml/BentoML/security/advisories/GHSA-v959-cwq9-7hr6 -~~	() https://github.com/bentoml/BentoML/security/advisories/GHSA-v959-cwq9-7hr6 - Exploit, Vendor Advisory

06 Apr 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-06 18:16

Updated : 2026-04-10 18:31

NVD link : CVE-2026-35044

Mitre link : CVE-2026-35044

CVE.ORG link : CVE-2026-35044

JSON object : View

Products Affected

bentoml

bentoml

CWE

CWE-1336

Improper Neutralization of Special Elements Used in a Template Engine

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